diff options
Diffstat (limited to 'arch/arm/cpu/armv8/fsl-layerscape/mp.c')
| -rw-r--r-- | arch/arm/cpu/armv8/fsl-layerscape/mp.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/arm/cpu/armv8/fsl-layerscape/mp.c b/arch/arm/cpu/armv8/fsl-layerscape/mp.c index 0d600db..df7ffb8 100644 --- a/arch/arm/cpu/armv8/fsl-layerscape/mp.c +++ b/arch/arm/cpu/armv8/fsl-layerscape/mp.c @@ -192,6 +192,12 @@ int cpu_release(int nr, int argc, char * const argv[]) (unsigned long)table + SPIN_TABLE_ELEM_SIZE); asm volatile("dsb st"); smp_kick_all_cpus(); /* only those with entry addr set will run */ + /* + * When the first release command runs, all cores are set to go. Those + * without a valid entry address will be trapped by "wfe". "sev" kicks + * them off to check the address again. When set, they continue to run. + */ + asm volatile("sev"); return 0; } |